Derrick.



A. G. A. SCHMIDT.

Patented 001120, 1908.

-' 3 SHEETS-SHEET 1.

rm: NORRIS PETERS cm, WASHINGTON, D. c.

A. A. SCHMIDT.

DERRICK.

APPLICATION FILED AUG. 5, 190a,!

Patented Oct. 20, 1908.

3 SHEETS-SHEET 2.

1H: NORRIS PETERS co., wxsmuarou, n, c.

A. G. A; SCHMIDT.

DERRICK. APPLIUATION FILED AUG. 5, 190 8.

Patented 001;. 20, .1908.

3 SHEETB' SHEET 3.

.MMMM

UNITED STATES PATENT OFFICE.

ALBERT G. A. SCHMIDT, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE NATIONAL EQUIPMENT COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION.

DERRICK.

Application filed August 5, 1908.

To all whom it'may concern:

Be it known that I, ALBERT G. A. SCHMIDT, a citizen of the United States, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Derricks, of which the following is a specification.

The invention relates to derricks and more particularly to bull -wheels therefor, and seeks to provide an improved bull-Wheel construction formed of structural metal and which is strong and durable, though of comparatively light weight.

A further object of the invention is to provide an improved bull-wheel construction which may be taken apart for transportation, and which is adapted for use with derricks of different sizes.

The invention consists in the features of improvement hereinafter set forth, illustrated in the accompanying drawings and more particularly pointed out in the appended claims.

In the drawings, Figure 1 is a view in elevation of a derrick to which'the present improved bull-wheel is applied. Fig. 2 is a plan view on an enlarged scale of the im proved bull-wheel with parts of the'derrick shown in section on the line 2-2 of Fig. 1. Fi s. 3 and 4 are transverse sections of the bull-wheel on the lines 33 and 44 respectively, of Fig. 2. Figs. 5, 6 and 7 are detail sections on the lines 55, 66 and 77 of Fig. 2.

The general construction of the derrick illustrated is similar to that set forth in a prior application filed by me April 6th, 1908, Serial No. 425,393, although the improved bull-wheel may be readily applied to other forms of derricks. In the form shown, the derrick mast 1 is provided at its lower end, (see Figs. 3 and 4) with a cast metal bottom piece 2. an annular head 3 that is arranged to engage and rotate within a suitable seat formed upon a cast metal step 4 that is mounted upon supporting timbers 5 or upon a suitable foun dation. At its upper end the derrick mast 1, in the form shown, is provided With a cast metal top 6 having an upwardly projecting gudgeon 7 that rotatably engages the mast bracing means. In the form shown, the mast bracing means consists of a pair of legs 8 having irons 9 bolted to their upper ends and engaging the gudgeon of the mast top.

Specification of Letters Patent.

This bottom piece is provided with Patented Oct. 20, 1908.

Serial No. 447,130.

The metal bottom piece or foot 2 of the mast is provided with side walls forming a socket into which the lower end of the mast 1 is stepped, and it is also provided with a air of upwardly and outwardly projecting ugs 10 which, as clearly indicated in Fig. 2, are arranged in line with two of the side walls thereof. A pintle 11 extends through these lugs and through the lower end of the derrick boom 12 and forms the pivot or journal about which the boom is swun in vertical direction. The hoisting tackle consists of the blocks 13 and 14' and the hoisting rope 15. The tackle block 18 is connected to a cap piece 16 upon the end of the boom by links 17. The rope of the hoisting tackle is connected at one end to the block 14, and thence passes over the pulleys of the blocks and over a pulley 18 journaled u on the boom 12 adjacent its end. The tac le then extends over a pulley 19 which is journaled within a recess 20 in the face of the mast 1, and thence the rope or hoisting line 15 eX- tends downwardly through a central opening 21 in the mast 1 and in the cast metal foot 2 and step 4 and-over a pulley 22 journaled in suitable lugs 23 on the under side of the step. From this point the hoisting line passes outwardly to the operating drum or Windlass.

The boom tackle comprises the pulley blocks 24 and 25 and the line or rope 26. The block 24 is connected by a chain 27 to the mast top 26 and the block 25 is connected by links 28 to the cap piece 16 on the outer end of the boom. The rope or line 26 is connected at one end to the block 25, thence extends over the pulleys of the blocks 24 and 25 and over a pulley 29' journaled in a recess in the face of the mast 1 adjacent its top. Thence the boom line or rope 26 passes upwardly through an opening in the mast top 6 and over the pulley 30 of a rooster bracket 31 that is journaled upon the gudgeon 7. From thence the boom line passes downwardly to its drum or Windlass.

The parts thus far described are more fully set forth in the prior application referred to, and may be widely varied without departure from the essentials of the present invention.

The improved bull-wheel is formed of structural metal bars and comprises a rim that is preferably formed of two semi-circular angle bars 42. The vertical flanges of these angle bars are wider than the horizontal flanges thereof and serve as a bearing for the ropes which turn the bull-wheel and derrick in opposite directions. The semi-circu lar rim sections 42 are detachably connected at their ends by plates 43. These plates are arranged beneath the horizontal flanges of the rim sections and are permanently connected by rivets 44 to the horizontal flange of one of said rim sections, and detachably connected by bolts 45 to the horizontal flange of the other of said rim sections. The vertical flanges of the rim sections are also provided at their ends with connecting straps 46 which are permanently riveted to the inner faces of the vertical flanges of one of the rim sections and detachably bolted to the vertical flanges of the other rim section. The bull-wheel is provided with a pair of parallel transverse bars 47, one of which extends between the ends of each semi-circular rim section 42. These transverse members 47 are formed of angle bars slightly smaller than the angle bars which form the rimsections and are connected at their ends to the ends of the semi-circular rim sections 42 by means of short vertical angle pieces 48 that are riveted respectively to the vertical flanges of the parallel angle bars and of the semi-circular angle bars 42. The plates 43 also extend beneath the horizontal flanges of the parallel transverse bars 47 and are permanently connected by rivets 44 to one of the transverse bars and detachably connected by bolts 45 to the horizontal flange of the other transverse bar.

The parallel transverse bars 47 are arranged in the plane of the bull-wheel and on opposite sides of a diameter thereof, and are adapted to receive the foot of the derrick mast to be secured thereto. For this purpose the central portions of the vertical flanges of the transverse bars 47 are provided with a series of openings through which extend a series of bolts 49, which also extend through the cast metal foot or bottom piece 2 of the derrick mast and rigidly secure the bull-wheel t0 the mast. The derrick masts 1 and bottom pieces 2 vary in size, and, in order that the bull-wheel may be used with different sized derricks, interchangeable cast metal filler-blocks 49* are interposed between the vertical flanges of the parallel transverse bars 47 and the sides of the mast bottom or foot 2. These filler-blocks are provided with openings arranged to receive the bolts 49. The parts are so arranged that the pivot pin or axis 11 of the boom will be at right angles to the parallel transverse bars 47 so that the boom itself'will be parallel with these bars.

Suitable brace-bars are provided between the transverse bars 47 and the semi-circular rim bars 42. These brace-bars preferably comprise two pairs of parallel angle bars 50. These pairs of brace-bars are arranged in line and at right angles to the transverse bars 47, and one pair of these brace-bars extends be tween the central portion of one of the transverse bars 47 and the central portion of the corresponding semi-circular rim bar 42. At their inner ends the parallel bars 50 are connected to the parallel bars 47 by means of short angle pieces 51 which are riveted to the vertical flanges of the bars. A set of four cornered plates 52 also extend beneath the horizontal flanges of the bars 47 and 50 and are riveted thereto, as indicated. The angle bars 50 are not quite as large as the angle bars 47, and hence, filler-pieces 53 are interposed between the horizontal flanges of the bars 50 and the plates 52. The outer ends of the parallel brace-bars 50 are connected to the semi-circular rim bars 42 by means of short angle pieces 54 that are riveted respectively to the vertical flanges of the bars 42 and 50. Corner plates 55 also extend beneath the horizontal flanges of these bars and are riveted thereto, as indicated. Fillerpieces 56 are interposed between the flanges of the bars 50 and the plates 55. The bracebars 50 of each pair are connected by two diagonal braces 57 which extend over and are riveted to the horizontal flanges of the bars. These braces are crossed and are riveted together at their points of intersection. The parallel bars 50 are spaced apart for a distance equal to that between the parallel bars 47, and a series of radial brace-bars58 extend between the corner plates 52 that connect the bars 47 and 50 and the semi-circular rim bars 42. These radial brace-bars are riveted at their inner ends to the corner plates 52 and at their outer ends are connected to the rim bars 42 by short angle pieces 59 that are riveted respectively to the vertical flanges of these bars, and by plates 60 that extend beneath and are riveted to the horizontal flanges of the bars 58 and 42, (see Fig. 7.).

Each pair of bars 50 are further connected together or braced at their outer ends by a short angle bar 61 that is riveted at its ends to the horizontal flanges of the bars 50 to the plates 55. The transverse bars 47 are detachably connected together 011 one side of the foot of the mast opposite the boom pivot or pintle 11 by means of a short angle bar 62, which is detachably bolted to short angle pieces 63 that are riveted to the vertical flanges of the bars 47. The bull-wheel is further braced by a set of four angle bars 64 1 which are inclined to be horizontal. At their outer lower ends (see Fig. 7) these bars are detachably connected by bolts 65 to the outer ends of the radial brace-bars 58. At their upper ends the inclined bars 64 are provided with angularly bent portions 66 which abut against the side faces of the mast l and are connected thereto by bolts or lagscrews 67.

A pair of inclined-bracing rods 68, (see Figs. 1 and 2) are bolted at their outer faces to the opposite side faces of the boom 12. Turn buckles 69 connect the inner ends of the bracing bars 68 to a pair of eye-bolts 70. Pins 71 pivotally connect the eye-bolts to a pair of lugs 72 formed upon the bull-wheel at opposite points adjacent its rim. These lugs are preferably in the form of short angle bars that areriveted at their lower ends tothe vertical flanges of the bars 61 and are upwardly and outwardly inclined therefrom. Bracing angle plates 73 are riveted to the horizontal flanges of. the bars or lugs 72 and to the end portions of the vertical flanges of the bars 50.

Each of the lugs or bars 72 is provided with a series of holes 74 for receiving the pivot pins 71.. It is essential that the pivot pins 71 shall be in line with the pivot pin or journal 11 of the boom, so that the boom and bracerods 61 may properly swing together in vertical direction. As stated, however, the improved bull-wheel is adapted to bemounted upon derrick masts and bottoms of different sizes. These sizes are standard and the holes 74 in the lugs or bars 72 are so arranged as to correspond withthe different locations of the boom'pintle in derricks of different sizes.

By means of the bolts 49, 65 and 67 and the pivot pins 71 the improved bull-wheel .1 may be readily mounted upon derricks of a pair of guide pulleys 76 mounted upon the supporting timbers 5, and thence extend in opposite directions about the vertical flanges of the rim bars 42. The ends of the ropes 75 extend through openings 77 in the vertical flange of the rim bars 42 adjacent the inner ends of the transverse bars 47 and the extreme ends of the ropes are connected by eyebolts 78 to the vertical flanges on the adjacent radial brace-bars 58.

It is obvious that numerous changes may be made in the details set forth without departure from the essentials of the invention.

I claim .1. A bull wheel for derricks formed of structural metal bars and comprising a rim, two transverse bars connected at their ends to said rim and arranged in the plane of the wheel on opposite sides of a diameter thereof to receive and be secured to the foot of the derrick mast and brace-bars extending between said transverse bars and said rim, substantially as described.

2. A bull wheel for derricks formed of structural metal bars and comprising a rim, two sets of parallel bars arranged at right angles to each other and connected together and to said rim, the bars of each set being arranged on opposite sides of two diameters of the wheel and radial brace-bars extending from the joints between said sets of parallel bars and the wheel rim, substantially as described.

3. A bull wheel for derricks formed of structural metal bars and comprising a rim, two parallel transverse bars connected at their ends to said rim and arranged in the plane of the wheel on opposite sides of a diameter thereof to receive and be secured to the foot of the derrick mast, two pairs of parallel bracing bars arranged at right angles to said transverse bars and connected to the central portions thereof and to said rim, and radial brace-bars connected to said rim and to said parallel transverse and said parallel bracing bars, substantially as described.

4. In a derrick, the combination with the rotatable derrick mastand boom journaled at the foot of said mast, of a bull wheel formed of structural metal bars and comprising a rim, a pair of transverse bars connected at their ends to said rim and arranged in the plane of the wheel on opposite sides of a diameter thereof to receive and be secured to the foot of the derrick mast, brace bars arranged in the plane of the wheel and extending between said transverse bars and said rim and inclined brace-bars extending between said wheel and said mast, substantially as described.

5. In a derrick, the combination with the rotatable derrick mast and boom journaled at the foot of said mast, of a bull wheel formed of structural metal bars and comprising a rim, two sets of parallel bars arranged at right angles to each other in the plane of the wheel and on opposite sides of two diameters thereof, said bars being connected together and to said rim and one pair of said bars being connected to the foot of the derrick mast, radial bracing bars arranged in the plane of the wheel and connecting the joints of said parallel bars and said wheel rim and inclined brace bars connected at their ends to the derrick mast and to said radial brace-bars, substantially as described. 2

6. In a derrick, the combination with a rotatable derrick mast and boom journaled at the foot of said mast, of a bull wheel formed of structural metal bars and comprising a rim, a pair of parallel transverse bars arranged in the plane of the wheel and on opposite sides of a diameter thereof and connected at their ends to said rim, said bars extending on opposite sides of the foot of the derrick mast, interchangeable filler blocks interposed between said bars and the foot of the derrick mast, bolts extending through said bars, filler blocks and the foot of the derrick mast, brace-bars extending between said transverse bars and said rim and inclined brace-bars extending between said wheel and the derrick mast, substantially as described.

7. In a derrick, the combination with a rotatable derrick mast and boom journaled at the foot of said mast, of a bull wheel formed of structural metal bars and comprising a rim, a pair of transverse bars connected at their ends to said rim and arranged in the plane of said wheel on opposite sides of the diameter thereof, said bars being centrally connected to the -foot of said mast, bracebars extendin between said transverse bars and said rim, Iugs carried by said brace-bars adjacent said rim, brace-rods connected at their outer ends to said boom and pins pivotally connecting the inner ends of said rods to said lugs, substantially as described.

8. In a derrick, the combination with a rotatable derrick mast and boom journaled at the foot of said mast, of a bull wheel formed of structural metal bars and comprising a rim, a pair of parallel transverse bars connected at their ends to said rim and arranged in the plane of said wheel on opposite sides of the diameter thereof and on opposite sides of the foot of the mast, interchangeable filler blocks interposed through said bars and the foot of said mast, bolts extending between said bars, filler blocks and the foot of said mast, brace-bars extending between said transverse bars and said rim, upwardly projecting lugs carried by said brace-bars at opposite points adjacent said rim, bracing rods connected at their outer ends to said boom and pivot pins connectin' the inner ends of said rods to said lugs, saidIugs having a series of openings to receive said pins, substantially as described.

9. In a derrick, the combination with a rotatable derrick mast and the boom ivoted to the foot of said mast, of a bul wheel formed of structural metal bars and comprising an angle bar rim, a pair of parallel transverse bars arranged in the plane of said wheel and connected at their ends to said rim, filler blocks interposed between said bars and the foot of said derrick mast, bolts extending through said bars, filler blocks and foot of said mast, two pairs of parallel brace bars arranged at right angles to said transverse bars and connected to the central portions thereof and to said rim, radial bracebars extending from the joints between said parallel transverse and said parallel bracebars to said rim, inclined brace-bars connected at their ends to said derrick mast and to said radial brace-bars, lugs connected to said pairs of parallel brace-bars adjacent said rim, bracing rods connected at their outer ends to said boom and pivot pins connecting the inner ends of said rods to said lugs, each of said lugs having a series of holes to adj ustably receive said pins, substantially as described.

10. A bull wheel for derricks formed of structural metal bars and comprising a rim formed of two semi-circular sections removably connected together at their ends, two transverse bars connected respectively to the ends of said semi-circular rim sections, said bars being arranged to receive and be secured to the foot of the derrick mast, and brace-bars extending between said transverse bars and said rim sections, substantially as described.

11. A bull wheel for derricks formed of structural metal bars and comprising a rim formed of two semi-circular sections detachably connected together at their ends, a air of parallel transverse bars, one of whici is connected to the ends of each of said rim sections, said transverse bars being arranged in the plane of the wheel on opposite sides of a diameter thereof to receive and be secured to the foot of the derrick mast, a pair of parallel brace-bars extending between the central portion of each of said rim sections and the corresponding transverse bar, and radial brace-bars connected to said rim and to said parallel transverse and said parallel bracebars, substantially as described.

12. A bull wheel for derricks formed of structural bars and comprising an angle bar rim formed of two semi-circular sections detachably connected together at their ends, two parallel transverse bars, one connected to the ends of each of said rim sections, said bars being arranged in the plane of said wheel on opposite sides of a diameter thereof to receive and be secured to the foot of the derrick mast, a pair of parallel brace bars arranged at right angles to each of said transverse bars and connected to the central portion thereof and to the central portion of the corresponding rim section, and radial brace-bars connected at their ends to the joints between said parallel transverse and said parallel brace-bars and to said rim, substantially as described.

13. In a derrick, the combination with a rotatable derrick mast and boom journaled at the foot of said mast, of a bull wheel formed of structural metal bars and comprisng a rim formed of two semi-circular sections detachably connected together at their ends, a pair of transverse bars, one connected to the ends of each of said semi-circular rim sections, said transverse bars being arranged on opposite sides of and secured to the foot of said derrick mast, brace-bars extending between said transverse bars and said rim sections, inclined, brace-bars connected to said bull wheel and to said derrick mast, and bracing rods pivotally connected to said bull wheel adjacent the periphery thereof" and connected at their outer ends to said boom, substantially as described.

14. In a derrick, the combination with'a rotatable derrick mast and the boom pivoted 5 at the foot of said mast, of a bull wheel formed of structural metal bars and comprising a rim formed of two semi-circular sections dctachably connected together at their ends, a pair of parallel transverse bars, one connected to the ends of each of said semicircular rim sections, a pair of brace-bars arranged at right angles to each of said transverse bars and connected to the central portion thereof and to the central ortion of the corresponding rim section, radial brace-bars connected to said rim and to the joints between said parallel transverse bars and said parallel brace-bars, inclined brace bars connected to said radial brace-bars and to said derrick mast, bracing rods connected at their outer ends to said boom and pivotally con nected to said bull wheel at points in line with the journal or pivot between said boom and said mast, substantially as described.

15. In a derrick, the combination with a rotatable derrick mast and boom pivotall mounted at the foot of said mast, of a bu l wheel formed of structural metal bars and comprising an angle bar rim formed of two semi-circular sections detachably connected together at their ends, a pair of parallel transverse bars, one of said bars being connected to the ends of said semi-circular rim sections, brace-bars extending between said transverse bars and the corresponding rim section, inclined brace bars extending between said bull wheel and said derrick mast, interchangeable filler blocks interposed between said parallel transverse bars and the foot of said derrick mast, bolts extending through said transverse bars, filler blocks and the foot of said derrick mast, lugs mounted on the brace bars of said bull wheel at opposite points, brace-rods connected at their outer ends to said boom, and pivot pins connecting the inner ends of said rods to said lugs, said lugs havmg a series of openings for receiving said pivot pins, substantially as described.

ALBERT G. A. SCHMIDT.

Witnesses:

HARRY L. CLAPP, KATHARINE GERLAcH. 

